Three Dimensional Stress Drop Models for Slip Zones in the Earth's Crust

地壳滑移带的三维应力降模型

• 批准号: 9105467
• 负责人: John Rudnicki
• 金额: $ 15.3万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105467&HistoricalAwards=false
• 关键词: Three; Dimensional; Stress; Drop; Models

This research applies an accurate and efficient method for analyzing cracks in a three-dimensional elastic half-space to the study of slip zones in the earth's crust. Previous studies are extended to consider the effects of non-uniform stress drop, segmented faults, and coupling of normal and shear stresses due to near-surface slip and non-planar slip zones and advance of slip zones. In addition, calculations are done to determine stresses and surface deformations due to the advance of shear faults into and around locked, or more resistant, portions of the shallow crust. The goal of these studies is to understand better the mechanics of earthquake slip and, in particular, conditions that control the initiation and termination of earthquake ruptures. This research is a component of the National Earthquake Hazard Reduction Program.

本研究采用了一种准确、高效的方法， 分析三维弹性半空间中的裂纹， 地壳滑动带的研究。 既往研究 扩展到考虑非均匀应力降的影响， 分段断层和耦合的正应力和剪应力， 近地表滑动和非平面滑动带及滑动推进 区界限 此外，进行计算以确定应力 以及由于剪切断层的推进而导致的地表变形， 以及围绕浅的锁定的或更有抵抗力的部分， 地壳。 这些研究的目的是为了更好地了解 地震滑动力学，特别是， 控制地震破裂的发生和终止。 这项研究是国家地震灾害的一个组成部分 减少方案。